I dont think you came off as a dick at all. In fact, I have seen more asshole responses from people on ebay about their cars you wouldnt believe.

I once asked a guy with a porsche for sale if he would negotiate the price by a fair amount. He responded with 3 paragraphs about how it was the BEST car ever made, it was rare, one of a kind, and id never drive anything like it. ... it was a 944 with a busted trans lol.